package services

import (
    "github.com/beego/beego/v2/core/logs"
    "sync"
    "time"
)

type ErrorHandler struct {
    mu     sync.RWMutex
    errors map[string][]ErrorEvent
}

type ErrorEvent struct {
    Time        time.Time `json:"time"`
    Subsystem   string    `json:"subsystem"`
    Type        string    `json:"type"`
    Message     string    `json:"message"`
    Resolution  string    `json:"resolution"`
}

func NewErrorHandler() *ErrorHandler {
    return &ErrorHandler{
        errors: make(map[string][]ErrorEvent),
    }
}

func (eh *ErrorHandler) LogError(event ErrorEvent) {
    eh.mu.Lock()
    defer eh.mu.Unlock()

    eh.errors[event.Subsystem] = append(eh.errors[event.Subsystem], event)
    
    // 记录到系统日志
    logs.Error("Subsystem %s error: %s - %s", 
        event.Subsystem, 
        event.Type, 
        event.Message,
    )

    // 尝试自动恢复
    go eh.attemptRecovery(event)
}

func (eh *ErrorHandler) attemptRecovery(event ErrorEvent) {
    switch event.Type {
    case "connection_lost":
        // 尝试重新建立连接
        eh.reconnectSubsystem(event.Subsystem)
    case "path_failure":
        // 切换到备用路径
        eh.switchToBackupPath(event.Subsystem)
    }
}

func (eh *ErrorHandler) reconnectSubsystem(nqn string) {
    // 实现重连逻辑
}

func (eh *ErrorHandler) switchToBackupPath(nqn string) {
    // 实现路径切换逻辑
}

func (eh *ErrorHandler) GetErrors(subsystem string) []ErrorEvent {
    eh.mu.RLock()
    defer eh.mu.RUnlock()
    return eh.errors[subsystem]
}
